Exam Answers v4.0
1. What two advantages does CIDR provide to a network? (Choose two.)
o reduced routing table size
o dynamic address assignment
o automatic route redistribution
o reduced routing update traffic
o automatic summarization at classful boundaries
2. Refer to the exhibit. Which address is a broadcast address for one of the subnets that are shown in the exhibit?
o 192.168.4.3/29
o 192.168.4.15/29
o 192.168.4.255/24
3. In the network shown in the graphic, three bits were borrowed from the host portion of a Class C address.
o 3
o 4
o 12
o 36
o 84
o 180
4. Which of the following are contained in the routing updates of classless routing protocols? (Choose two.)
o 32-bit address
o next hop router interface
o subnet mask
o unicast host address
o Layer 2 address
5. Refer to the exhibit. The network administrator wants to create a subnet for the point-to-point connection
o 255.255.255.192
o 255.255.255.224
o 255.255.255.240
o 255.255.255.248
o 255.255.255.252
6. What does VLSM allow a network administrator to do?
o utilize one subnet mask throughout an autonomous system
o utilize multiple subnet masks in the same IP address space
o utilize IGRP as the routing protocol in an entire autonomous system
o utilize multiple routing protocols within an autonomous system
7. Which three interior routing protocols support VLSM? (Choose three.)
o OSPF
o RIP v1
o RIP v2
o EIGRP
o BGP
o STP
8. Which of the following problems does VLSM help to alleviate?
o the shortage of IP addresses
o the difficulty of assigning static IP addresses to hosts in large enterprises
o the complexity of implementing advanced routing protocols such as OSPF and EIGRP
o the shortage of network administrators qualified in the use of RIP v1 and IGRP
9. Refer to the exhibit. A network technician enters the static route in R1 needed to reach network 10.1.1.0/24.
1. pings from R1 to the S0/0/0 interface on R2....successful
2. pings from R1 to the Fa0/0 interface on R2....successful
3. pings from host B to hosts on the 10.1.1.0/24 network....successful
4. pings from host B to the Fa0/0 interface on R2....successful
5. pings from R2 to host B....successful.
What is the likely cause of the failure of the ping from R1 to host B?
o The default gateway on host B is not correctly set.
o There are no routes back to networks connected to R1 from R2.
o There is a Layer 2 problem between R2 and host B.
o Host B has a defective Ethernet card.
10. A network administrator is tasked with dividing up a class C network among the QA, Sales, and
o 255.255.255.252 for QA
o 255.255.255.224 for Sales
o 255.255.255.240 for QA
o 255.255.255.248 for QA
o 255.255.255.0 for Sales
11. Refer to the exhibit. A network engineer is summarizing the two groups of routes on router R1 shown in
o 192.168.0.0/23
o 192.168.0.0/22
o 192.168.0.0/21
o 192.168.0.0/20
12. A Class C address has been assigned for use in the network shown in the graphic. Using VLSM, which
o /31
o /30
o /29
o /28
o /27
o /26
13. Refer to the exhibit. In the network that is shown, the router interfaces are assigned the first address in
o 192.168.1.5/30
o 192.168.2.17/28
o 192.168.2.63/27
o 192.168.2.130/25
14. Refer to the exhibit. What subnet mask will be applied if Router A sends a RIPv1 update for the network
o none
o 8
o 16
o 24
15. Refer to the exhibit. The number of required host addresses for each subnet in a network is listed in the
o 6
o 14
o 29
o 34
o 40
o 62
16. An additional subnet is required for a new Ethernet link between Router1 and Router2 as shown in the
o 192.1.1.16/26
o 192.1.1.96/28
o 192.1.1.160/28
o 192.1.1.196/27
o 192.1.1.224/28
o 192.1.1.240/28
17. What is a supernet?
o the network for a default route
o a summarization of classful addresses
o a network that contains both private and public addresses
o a set of discontiguous networks that are controlled by an ISP
18. Refer to the exhibit. A network administrator needs to create two subnetworks from 10.0.0.0/8 for a router
o Because RIPv2 does not support VLSM, the subnet masks will not be allowed.
o The subnets will not have enough host addresses for the given network requirements.
o The subnets overlap and will be rejected by the router.
o The router will support the addressing scheme.
19. A router has a summary route to network 192.168.32.0/20 installed in its routing table. What range of
o 192.168.0.0 – 192.168.32.0/24
o 192.168.0.0 – 192.168.47.0/24
o 192.168.32.0 – 192.168.47.0/24
o 192.168.32.0 – 192.168.48.0/24
o 192.168.32.0 – 192.168.63.0/24
20. Refer to the exhibit. The network administrator wants to minimize the number of entries in Router1’s
o VLSM
o CIDR
o private IP addresses
